Annular slide-valve.



Z No. 637,487. Patented Nov. 2|, I899.

w. SELLERS & w. LEWIS.

ANNULAR SLIDE VALVE.

Application filed Jan. 20, 1899.)

W/ T/VESSES 7 lfWE/V'TORS 7L IAQI 7 "0-. 637,487. Patehted Nov. 2|,1as9.w. SELLERS & w. LEWIS.

ANNULAR SLIDE VALVE.

FIGZ).

No. 637,487. Patented Nov. 2|, I899.

W. SELLERS &. W. LEWIS.

ANNULAR SLIDE VALVE.

(Application filed Jan. 20, 1899.

WITNESSES: llVl/E/VTORS No. 637,487. Patented Nov. 2|, I899. W. SELLERS&. W. LEWIS;

ANNULAR sum-z VALVE.

(Application filed Jan. 20, 1899.) (No Model.) 5 Sheets-Sheet 4,

: P FIGJ. i L i w G i K g e 8 i G Li B O Vic i W/T/VESSES: Y IIVVE/VTORSm, St w A am 114: sounds wrrzns coy. wow-umu. WAsHINGTON, u. c.

UNITEL) STATES FATENT EEIGE.

WILLIAM. SELLERS AND WILFRED LEwIS, or PHILADELPHIA, PENNSYL- VANIA,ASSIGNORS TO THE WILLIAM SELLERS a coMPANY,'INcoRPo- RATED, OFPENNSYLVANIA.

SPECIFICATION formingpart of Letters l atent No. 637,487, dated November21, 1899.

Application filed January 20, 1899. Serial No. 702,805. (No model.)

T 00% whom it may concern.-

Be it known that we, WILLIAM SELLERS and WILFRED LEWIS, of the city andcounty of Philadelphia, in the State of Pennsylvania,

have invented certain new and useful Im provements in AnnularS1ide-Valves,of which improvements the following is a specification.

The annular Slide-valve has heretofore been constructed on one side of adisk which is provided with a cylindrical pin upon the other side bywhich the valve is moved back and forth over its ports, while at thesame time it is free to rotate about this driving-pin.

r 5 The use of this valve by reason of its large diameter in proportionto its port areashas been confined almost exclusively to hydraulicmachinery, where the volume of water is small and the pressure is large,and, in fact,

' it is the only metallic valve for this purpose that will maintainwithout packing a tight joint between the metallic valve and itsmetallic seat. This is due to the mode of propulsion,which permits it torotate freely about 2 5 its axis while it is moving in a plane at rightangles thereto, whereby if any part of its surface should tend to seizethis would cause the valve to rotate about its axis, changing thedirection of the sliding movement and preventing the threatened seizure.The use of such a valve has been further limited by the great pressureto which its sliding surface is subjected by reason of its unbalancedcondition.

It is one object of our invention therefore to provide a simple andreliable means for measurably balancing the pressure upon the slidingsurfaces of such valves.

It is a further object to balance the stem through which such a valve isoperated.

It is a further object to utilize the annular valve for distributing thefluid to the several plungers seriatim of a motor.

It is a further object to reverse the flow of fluid through such avalve, so as thereby to reverse the direction of rotation of said motor.

It is a further object to measurably balance such a distributing andreversible annular valve.

It is a further object to balance the driving member of such a'valve;and it is a further object while so balancing the driving member toretain the necessary pressure upon the valve-face.

The means by which these objects are accomplished are shown in theaccompanying drawings, which form part of this specification, in whichsimilar letters refer to similar parts throughout the severalillustrations.

Figure 1, Sheet 1, is asection through the axis of an annularslide-valve, its valve-seat, and valve-case, showing the valve-stemperpendicular to the valve-seat and partlyin section. Fig. 2 is a planof the valve-seat and valve,showing the ports to and from the valvecase.Fig. 3, Sheet 2, is a section through the axis of an annularslide-valve, it valve-seat, and valve-case, showing the valve-stemperpendicular to the valve-seat, with a modification of its connectionwith the valve. Fig. 4 is a plan of the valve, valve-seat, and ports.Fig. 5, Sheet 3, is a section through the axis of an annularslide-valve, its valve-seat, and valve-case, showing the valve-stemparallel to the valve-seat. Fig. 6 is a plan of this valve, valve-seat,and ports. Fig. 7, Sheet 4, is a section .through the axis of arotatable annular slide-valve and its driving member with receiving anddelivery ports, the functions of which may be reversed by reversing theflow of the fluid-pressure. Fig. 8 is a section on the line A A, Fig. 7,and Fig. 9 is a section on the line B B, Fig. 7.

In Fig. 1, Sheet 1, D represents the annular slide-valve, E the seat,and F the case thereof. G is the driving member, which fits and closesthe bearing on the interior of the valve D, which is rotatable about thedriving member G. This driving member is united to the valve-stem H bythe crank I, so that by vibrating the stem I-I about its vertical axisthe valve D will be moved back and forth over the ports a, b, and c,which are shown by dotted and full lines on the plan Fig. 2, which alsoshows the inletport J. The driving member G being open to the face ofthe valve, which always covers the exhaust-port, the crank I, whichsupports it from the valvestem H, would be forced down upon the valve bythe fluid-pressure in the valve-case F but for the same pressure overthe area of the valve-stem H in the opposite direction, so that if thevalve-stem and the driving member are of the same diameter they willbalance each other. The driving member G is packed in the bearing of theannular valve to prevent any escape of the pressure fluid around thismember to the exhaust-port, the area of which will relieve the valveitself from so much of this pressure. As this valve is moved back andforth over the ports it will be subjected to a varying pressure,dependent upon its position over the ports, and it must always besubject to enough pressure to prevent the escape of the pressure fluidbetween the valve face and its seat, so that it is not possible torelieve it from all pressure toward its seat. Subject to this limitationthe driving member G may be of any diameter, and to this extent thevalve may be balanced in a simple and effective manner.

Figs. 3 and 4, Sheet 2, represent the same conditions as those abovedescribed, but the connection between the valve D and the driving memberG is the converse of that shown in Fig. 1. The driving member in Fig. 3is the crank I of Fig. 1,and the cylindrical projection in the axis ofthe valve D is the driving member Gof Fig. 1. In the first instance thevalve surrounds the driving member and in the second the driving membersurrounds the valve, the operation of the driving member and the valvebeing the same in both. The driving member G, Fig. 3, fits the bearingon the exterior of the cylindrical projection of the Valve D and closesit against access to the valve-face by the opening (I in the same mannerthat the driving member in Fig. 1 closes access to its valveface. Thediameter of the cylindrical projection on the valve determines theamount of pressure from which the valve is relieved, and the diameter ofthe valve-stem compared with that of the pr'ojection determines whetherthis stem shall be entirely or only partially balanced. If thevalve-stem is of less diameter than the projection, the driving memberwill press upon the valve, and if greater the crank I will be forcedagainst the valve-case, or the valve-stem may have an outer support toreceive this pressure. It is evident, therefore, that the areas of thebearing on the valve, its driving member, and the valve-stem may bevaried to modify the balancing of both the valve and the valvestem asdesired.

Fig. 5, Sheet 3, represents a similar valve to that shown in Fig. 1; butthe driving member G is supported by a valve-stem II, which movesparallel to the valve-seat and is balanced by passing through oppositesides of the Valve-case. The diameter of this valvestem must be such asto sustain the fluidpressure upon the driving member G.

Fig. dis a plan of the valve-seat shown in Fig. 5, witha cross-sectionof the valve on the line C C, Fig. 5, showing the ports a, b, and 0under the valve and the inlet-port J. The outline of the Valve-seat isshown by the line 6 e of such size and shape that the valve in itstraverse will pass over the edge of its seat in every direction to avoidthe formation by wear of any ridges exterior to the valve.

Fig. 7, Sheet 4, represents a rotatable annuiar slide-valve D, its seatE, and its case F for directing fluid-pressure to the several pistons ofa motor. The driving member G fits and closes the bearing in the valve Dand is rotatable about an axis eccentric to the axis of the valve. Thisdriving member is extended in this eccentric axis beyond the valve onone side (marked G) and the valve-seat on the other, (marked G.) On theend G is mounted a sleeve II, the outer end of which is of the samediameter as the bearing in the valve D, and the inner end is enlarged tocover and inclose the valve D. The sleeve II is secured upon the drivingmember G by the pin 6, so as to form a chamber between this member andthe enlarged end of the sleeve II, which is filled by the valve D and inwhich this valve can turn freely about its axis. The side of the valve Dopposite its seat is provided with a circular rib f, on each side ofwhich a packing is mounted and held in place by the two circular ribs onthe circular plate 9. The effect of this arrangement is to permitpressure fluid to pass the packings either from the inside or from theoutside of the valve; but from Whichever side this Iluid enters thespace above the valve D it cannot pass out on the other side. Theexterior of the sleeve H, whichis of the same diameter as the bearing inthe Valve D, is fitted to the stuiling-box K, which is screwed into thevalve-case F and packed below the screw-threads, as shown, to preventthe escape of fluid-pressure at this point. The outer end of thisstuffing-box is provided with a recess for the packing, a follower J,and a packing-nut K, which operate in the usual manner, and the sleeveII is sustained against the fluid-pressure in the valve-case by the nutL on the end of the extension of the driving member G. The extension ofthe driving member G, beyond the valve-seat and its ports, is providedwith a sleeve H, the outer diameter of which is equal to the outerdiameter of the valve D and is supported by the valve-case F, in whichit can rotate freely. It is secured upon the extension of the drivingmember G" by the nut L and the key h. The sleeve H is extended beyondthe nut L to form a face-plate H, provided with beltholes 2' t' tosecure it upon a similar plate on the motor which drives it or upon anattachment thereto rotating in the same time. The

outer circumference of the sleeve II" is packed by a stuffing-box, thefollower J, and a packing-nut K in'the usual manner.

Fig. 8, Sheet 5, is across-section of the driving member G", the valveD, and the valvecase F on the lineA A, Fig. 7, in which N is cams? 3these ports alternately to the valve-chamber and to the chamber 0 aboutthe eccentric axis, which is open to the face of the valve D.

Fig. 9, Sheet 5, is a cross-section of the valvecase F on the line B B,Fig. 7, and shows the three ports a b c with their outlets from thevalve-case F, also the port Nfrom the chamber O to the exterior of thevalve-case. Supposing the pressure fluid to be admitted to thevalve-chamber by the port N, it will pass the packing on the outside ofthe rib f; but as it cannot pass the packing on the inside of this ribit will force the face of the valve D upon its seat by pressure upon itsback, and at the same time will force the sleeve H in the oppositedirection; but as this sleeve is of the same diameter as the drivingmember G, which is open to the port N, in this case the exhaust, theoutside pressure on the sleeve H will be balanced, because the pressureis all over the interior of the valve-chamber, except the driving memberG, which is of the same diameter as the sleeve H, and

the pressure upon these being in opposite directions they balance eachother. If now the pressure fluid is admitted to the valve D through theport N, it will pass the packing on the inside of the rib f; but as itcannot pass the packing on the outside of this rib it will force theface of the valve D upon its seat by pressure upon its back, and at thesame time will force the sleeve H in the opposite directionthat is, thefluid-pressure on that side will be all over the surface inclosed withinthe outer circumference of the valve, which will be balanced by thesleeve H, which is of the same diameter, so that in whichever directionthe fluid-pressure is admitted the driving member will beobalanced, andthe pressure upon the valve will be limited to the area-of its annulus.This maybe modified by increasing or decreasing this annulus inproportion to that of the valve-face, and by admitting the pressurefluid to the interior or to the exterior of the valve the direction ofrotation of the motor which it supplies will be reversed.

Having thus shown and described our improvements in annularslide-valves, what we claim as new, and desire to secure by LettersPatent, is

1. An annular slide-valve rotatable about its own axis on a bearing, anopening from the bearing to the face of the valve, and a driving memberwhich fits and closes the bearing. 2. A valve-case which incloses anannula slide-valve rotatable about its own axis on a bearing, an openingfrom the bearing to the face of the valve, a driving member which fitsand closes the bearing, and is supported by a valve-stem which passesout of the valvecase.

3. A valve-case which incloses an annular slide-valve rotatable aboutits own axis on a bearing, an opening from the bearing to the face ofthe valve, a driving member which fits and closes the bearing and issupported by a valve-stem eccentric to the driving member, which stempasses out of the valve-case at right angles to the valve-seat.

4. A valve-case which incloses an annular slide-valve rotatable aboutits own axis on a bearing and about an axis eccentric to the axis of thevalve, an opening from the bearing to the face of the valve, a drivingmember rotatable about the eccentric axis which fits and closes thebearing, a chamber about the eccentric axis open to the face of thevalve, and a plurality of ports in the valveseat concentric with theeccentric axis, which by the rotation of the valve about the eccentricaxis, are alternately opened to the valvecase and to the chamber aboutthe eccentric axis.

5. A valve-case which incloses an annular slide-valve rotatable aboutits own axis on a bearingand about an axis eccentric to the axis of thevalve, an opening from the bearing to the face of the valve, a drivingmember rotatable about the eccentric axis which fits and closes thebearing, a chamber about the eccentric axis open to the face of thevalve, an opening from this chamber to the outside of said valve-case, aplurality of ports in the valve-seat concentric with the eccentric axis,which by the rotation of the valve about the eccentric axis, arealternately opened to the Valve-case and to the chamber about theeccentric axis.

6. A valve-case which incloses an annular slide-valve rotatable aboutits own axis on a bearing and about an axis eccentric to the axis of thevalve, an opening from the bearing to the face of the valve, a drivingmember rotatable about the eccentric axis which fits and closes thebearing, a chamber about the eccentric axis open to the face of thevalve, an opening from this chamber to the outside of said valve-case, aplurality of ports in the valve-seat concentric with the eccentric axis,which by the rotation of the valve about the eccentric axis, arealternately opened to the valve-case and to the chamber about theeccentric axis, and means to balance the driving member when thepressure fluid is admitted either to the inside or to the outide of thevalve.

7. A valve-case which incloses an annular slide-valve rotatable aboutits own axis, and about an axis eccentric to the axis of the valve, aplurality of ports in the valve-seat concentric with the eccentric axis,and means which balance fluid-pressure admitted to the inside or to theoutside of the valve.

8. A valve-case which incloses an annular slide-valve rotatable aboutits own axis and movable in a plane perpendicular to its axis sides ofthe Valve, with means adapted to 10 of rotation, and means which balancefluidmaintain fluid-pressure on the side opposite pressure admitted tothe inside or to the ontthe valve-face. side of the Valve.

9. A valve-case which incloses an annular 1 WM. SELLERS. slide-valverotatable about its own axis on a l VILFRED LE WIS.

\Vitnesses:

JOHN L. PHILLIPS, E. R. HARPER.

bearing", an opening from the bearing to the face of the valve, adriving member which fits and closes the bearing and covers two otherCorrection in Letters Patent No. 637387,

It ishereby certified that in Letters Patent No. 637,487, grantedNovember 21, 1899 upon the application of William Sellers and WilfredLewis, of Philadelphia, Pennsylvania, for an improvement in AnnularSlide-Valves, an error appears in the printed specification requiringcorrection, as follows: In line 125, page 3, the word outide should readoutside and that the said Letters Patent should be read with thiscorrection therein that the same may conform to the record of the casein the Patent Office.

Signed, countersigned, and sealed this 5th day of December, A. 1).,1899.

Se/inf WEBSTER DAVIS,

Assistant Secretary of the Interior. Gountersigned G. H. DUELL,

Commissioner of Patents.

